Air One Tech

My review is way too late, but better late than never. Last July, my AC was not cooling down my place, so I called Air One Tech based on my friend’s recommendation and stellar Unilocal reviews. They diagnosed the issue and came back to replace the compressor of my AC unit and another missing part, piston, which caused the compressor to be shorted in the first place. They were professional, efficient, and knowledgeable. I felt I could trust them with an expensive repair. The owner was there when replacing the compressor and also called later to make sure the AC was functioning as it should. I would call them again if my HVAC malfunctions, and I have already recommended them to others.

Air One Tech did a great job installing an new HVAC system after our old one failed.
First the service call when my old system died: Dariush was professional and made it easy to understand the problem and alternative solutions. At no point did I feel like I was being pushed to do something against my best interests, and felt high trust in Dariush’s advice. He is also very opinionated (a good thing!) — Dariush refused to install brands he considered subpar (which my own subsequent independent research confirmed).
On the day of install: The Air One Tech team arrived on time, got the work done with minimal disruption to my house, and finished the job when they said they would. As a much appreciated bonus, Air One Tech replaced a piece of duct work that had rusted badly attached to the old air handler at no extra charge. 2 weeks later, the new system is working great and handling the wild swings in spring temperature like a champ.
Dariush and his team at Air One Tech are a class act, and I would recommend them to anyone who needed HVAC work done in the NOVA area.

I recently purchase a condo and wanted to have my HVAC serviced before I moved in. I called Air One Tech because of their fantastic reviews on Unilocal.
Highlights:
— Prompt and on time. Confirmed in the morning with me before they arrived.
— $ 95 to service the HVAC and make sure that everything was working properly. — - The team led my Mike E was knowledgable, quick, and efficient He knew what he was doing when conducting all of his tests
— Provided a detailed report immediately after using an app on his phone and receipt of payment.
To Note — Was originally told 10% off coupon on website would be able to be used by someone who scheduled my appt but when presented at the end of service to pay, was told could not be used for maintenance. I scheduled the appt on the phone on 3÷23÷16 at 5:29pm fwiw.
Would recommend and will likely use them for my annual HVAC servicing!
Update: The owner Dariush reached out to me and apologized regarding the confusion with the 10% coupon. He explained to me that he would offer me a refund of the difference or a rain check in the future. Honestly, this was great to hear, not because of the $$, but because it showed that the owner cared about each of his customers. He is willing to go above and beyond to make sure everything is exactly what was agreed upon. Thank you for understanding Dariush.

I contacted Air One Tech and Dariush for a free estimate, as I was considering getting my HVAC system replaced in my townhouse. While the system was old (14 years old), it was not in need of immediate replacement but I wanted to get it replaced before it potentially broke during the hot summer season.
Dariush was able to come to the house and give a free, in-​person estimate. He explained what needed to be done, and what he could/couldn’t do. He gave a fair estimate in comparison to other vendors I contacted. Ultimately I chose to use him because he went out of his way to explain the different HVAC parts and how the units function as a whole. For someone who has no clue how these things work, it was nice to see a contractor take the time to explain the different options in detail.
The work was done in one day and the crew was very clean throughout. I highly recommend Air One Tech and commend Dariush and his crew on the great job they did. I will certainly reach out to him for any future HVAC type of needs.

Dariush fixed my furnace a few weeks ago when it was still cold. He came to my house earlier than expected, and he waited for me to come home for about half an hour! He found out that the control board of my furnace was not working, and he had to order the control board from the manufacturer and came back to my house to replace it. The furnace is now working wonderfully. After fixing it, he even called back and asked me if it is working well! Great guy and great service!

We own a rental property in Fairfax in which the furnace’s light had gone off. My husband was out of town so I called these guys to come out and see if they can light the furnace. The guy who answered the phone was extremely helpful and told me that it’s very easy to do and should take no more than 5 minutes. He told me that if he comes out he will charge me $ 95 because that’s their service fee (which I was willing to pay). He then said that it would be just easier if he walked me through it over the phone because he said it wasn’t worth me paying $ 95. OMG! blown away with the honesty of this company! So refreshing to see that people can be so kind and caring about someone over the phone that do not even know. Nevertheless, he walked me through the process and I lit the furnace myself (such a proud moment).
Oh not over yet. He called me the next day just to make sure that it was working and if I had any further questions. If I ever need any kind of service I know exactly who to call. Thank you for helping me out this week!

Absolutely AMAZING service and professionalism. The technician was prompt and competent and saved me money every way he could. I will definitely use them again in the future. I can’t say enough about this company.

The Blizzard of 2016 left my family with no Heat! Several other companies promised to come repair it but never showed after 4 days. Air One Tech arrived within 90 minutes of my initial call. They were timely, professional and fixed the heat pump in no time. Would certainly recommend!

Quick response and scheduling despite the nasty weather at the time. Offered fair price and communicated well throughout the process. Recommended.

Their estimate was right in line with the lowest cost estimate we received, but they were way more thorough in their evaluation and recommendation than any of the other providers. The install was done quickly and cleanly and we could not be happier with the HVAC unit they installed, which was a larger unit than other firms had specified. The new unit works so much more efficiently than the previous unit, which was clearly undersized. Neither of the other providers identified the fact that our current unit was too small. The service was great and the install was fast and clean. I would highly, highly recommend these folks. They definitely know what they’re doing and the service was top notch!

I can’t say enough good things about Dariush and his team. They were prompt, professional and did a great job. I had my AC, furnace and hot water heater replaced at the same time because I needed to direct vent everything. Dariush gave me great advice and a competitive price; they even did the work 2 days before Christmas in the pouring rain. He even called a week after the job just to check in to see how everything was working. I hope that I won’t need another HVAC company for 10+ years, but I’d give Air One Tech 6 stars if I could.

Our house has two separate heating/​AC systems, and both furnaces were approaching their end of life about one year ago. We got 4 bids. Air One Tech was not the cheapest (not the most expensive either), but Dariush explained all aspects of the bid as well as other technical questions we had. Installation of both systems took about 2 days. One had noisy air flow, but Dariush came back within a day and flxed it. We waited a year before posting just to make sure all was OK. We have recommended them to others for their consideration.

Very prompt, high quality and very professional. We have used Air One Tech for the past several years for regular maintenance and emergency repairs and we have always been very impressed with the level of service! Highly recommended.

These guys are great. They came out to try and resolve a problem with my AC. Later, the fix didn’t take, because I had a freon leak. They came back out on no charge and re-​diagnosed the actual problem. Techs were on time, and friendly. Very straight forward about pricing and expectations. Would use them again.

Hassan, came right away and diagnosed the problem. He did great work and got my heat working again. I highly recommend their service

This review is about our experience with Dariush and the installation of our furnace. I found Dariush through Unilocal reviews. It was a truly 5-​star experience. He was easy to reach, responsive, friendly, patient, punctuate and professional. He not only quickly installed our new furnace, but also followed up with me after the installation to see if everything worked okay. I have been debating if I should write the review now or wait a bit longer to see how the newly-​installed furnace runs. I decided to write it now to help others who may be looking to Unilocal in the search for a customer friendly company. Dariush gave a good labor warranty, which I would like to think is an indication of his confidence in the quality his work. I hope we do not use it, but if we do, I will update this review. When I began to write this review, I remembered how I got a plumbing company to change our water pressure valve a few years back. It was also through Unilocal.But that experience did not turn out to be the 5 stars services as the reviewers said on Unilocal.I wish I had written a review back then. There may be some truth to the complaint of «shadow reviews». I would suggest anyone who reads the review do his or her own due diligence in their search of a service company.

Prompt, knowledgable and reasonable. I would definitely hire him again. He took the time to explain everything to me and didn’t try to sell me anything I didn’t need. Small company so you deal with the owner which is always a plus.

Recently I purchased a new Trane HVAC system from Air One Tech, after thorough review of three other suppliers. I knew I made the right choice with Air One Tech and would like to express my great satisfaction with Dariush Jamasb who was very thorough in his explanation of the project and benefits of this unit. He had my best interest in mind and made the process very simple. I would also like to compliment Farshad, installer, who was very professional and knowledgeable in the work, which was done with no mess or disruption. I highly recommend this company.

I hired Air One Tech to install a new Furnace and Air Conditioner in my Arlington home. Their quote was extremely competitive and their two year warranty on labor was very reassuring. Dariush has been pleasant to work with, and his crew was polite and competent. I also liked that Dariush was present for the entire installation process, and followed up to make sure we were happy. He returned to replace a return air vent with a needed larger one, charging only for the parts. I am happy to recommend this company for your HVAC needs!

These guys were great. Came to give me an estimate on installation of my HVAC. On time and great crew who cleaned up afterwards and wore shoe protectors in the house. Because my townhouse is old and tiny, the installation took a few hours longer than anticipated. But Dariush stuck to the price he had quoted me despite the extra labor. When I needed a different type of wiring installed due to my house being old, he recommended an electrician and then came out to connect it at no charge. I felt the owner was straightforward, honest, and kind, and he explained everything to me perfectly. Highly recommend!

I called Air One Tech and was able to get an appointment the same day. The professionalism, knowledge and courtesy that was displayed by Dariush and his team was exceptional. Dariush gave me his recommendations of tasks that I could do myself rather than burden me with additional costs. He also gave me valuable information regarding my plumbing as well. He went over and above with his troubleshooting steps. I noticed that he was constantly going back and testing other components after he had reassembled everything. This speaks volumes because this team does a thorough job to review any additional possibilities. Once they were finished they cleaned the area to make sure it was left nice and neat. Oh and an extra bonus… the price was extremely reasonable. I even got a followup call in a few days!
I highly recommend Dariush and his team.

Called Dariush based upon a friend’s suggestion and also the great reviews on Unilocal!He was accommodating to my schedule and very responsive to my online inquiry! He was honest, upfront about the costs and work prior to doing anything and kept me in the loop the entire time. He and his technician were swift, clean and got it done quick. I was very comfortable with his team and his work. I’d suggest him for other HVAC needs.

Dariush and his team are terrific! I received 3 proposals for a new hvac and water heater — it came down to trust. So pleased I chose the perfect company to work with — air one. Very professional, knowledgeable and dependable. I’ll use them again and refer them to friends.

This place is as good as it gets. Trust the reviews and delete your Angie’s List subscription. We are having tons of work done and a bit cautious due to a few bad experiences. We called on Air One Tech twice and both were good experiences. They are reliable, responsive, knowledgeable, and reasonably priced. Refreshing experience.

Am trying to sell my house, and discovered with horror on the day of an open house we held that the AC wasn’t working. The next morning (Monday), I looked around, saw the great reviews about Air One here on Unilocal,and decided to call them. Good decision on my part.
They were able to come by my house that day, found and fixed the problem quickly (thankfully, it was only the capacitor), checked the system, and headed out without trying to upsell me, etc. Quick, professional, and knowledgeable. Would definitely use them again!

THIS IS THE ONLY COMPANY YOU SHOULD EVER USE FOR A/​C PROBLEMS!
Take my word for it. I had MyPlumber come in for a routine six-​month check because air flow wasn’t as strong as it was the year before. After taking a couple of hours to check everything, the tech declared the whole coil system needed to be replaced at the tune of more than $ 2K. I called Frosty’s who had done the checkup before and a tech came out. Frosty’s declared the coils fine and something with the outside unit needed to be replaced.
I called Darius with Air One Tech because I needed a third opinion. He and his colleague were extremely thorough, debunked both other company’s techs, and found out… oh, the outside breaker HAD BEEN TURNED OFF. I think it was the MyPlumber tech but I can’t prove it. Also found out both techs had been analyzing THE WRONG OUTSIDE AC SYSTEM. Unreal.
Turned the breaker back on, added a little freon, adjusted vents based on duct location and boom!, instant coolness throughout the house.
I will never, ever use another company.

Darius is top notch!

Furnace started tripping Flame Rollout Switch. We just bought the house 6 months ago, so had home warranty. Called them, and they put me in touch with Air One Tech. Dariush came out and diagnosed the problem as a cracked heat exchanger.
Home Warranty wanted second opinion and sent another company to look at it, same diagnosis. Home Warranty agreed to replace the 23 year old furnace, and chose the second company (who’s address is someone’s house.), and was going to install low end unit.
I preferred to go with Air One Tech as they were more well known and had great reviews. Dariush also seemed more knowledgeable. Decided to replace the old AC unit at the same time, and wanted to go with a Trane system after researching. Called Dariush and he sent me 2 estimates for different units within 2 hours, and explained the systems to me.
I chose one, and he came by the same day (Tuesday) to measure and plan for the job. Thursday he and 2 others from Air One Tech arrived and installed the new system. After removing the old system, he showed me inside where there were actually several cracks in the primary heat exchanger.
The lines from AC to inside unit were badly kinked in 2 places, and needed replaced. He routed the new lines more efficiently than the old lines were. They were able to handle that unexpected additional work after showing and explaining to me, and getting my approval, at a fair price, and we had heat that day. Upgraded from 90% to 97% efficient and from SEER 10 to 16.
System is running great, connections to air ducts are sealed, no leaks like the old system had where it connected. After installation was complete, they checked air flow at registers, explained the dual-​stage system, and configured my Nest thermostat to work with the 2 stages of heat. He also made sure I knew I had to register the equipment online with Trane to get the full 10 – 12 year warranty.
Communications via email, phone, and text were always prompt, professional, friendly and helpful.

Darius was fantastic. He was timely, professional, provided genuine and honest recommendations for an emergency AC issue over the summer. I was so grateful that he was able to come for diagnosis within 24 hours after initial request, identified the problem, and promptly replaced the AC so I dont have to suffer DMV summer heat.
His price was fair, and most importantly, provided excellent service. Also, he sends receipts and invoices electronically. yay to keeping the environment green!